What is the predicted fate of the universe if dark energy causes expansion but does not become overwhelmingly powerful?

Answer

The Big Freeze (Heat Death)

If dark energy continues to dominate expansion without an extreme increase in strength, the universe faces a cold death where isolation increases, stars exhaust fuel, and the temperature approaches absolute zero.

What is the predicted fate of the universe if dark energy causes expansion but does not become overwhelmingly powerful?
physicsuniversespeedcosmologyspacetimeexpansionBig RipUniverse Expansionrate of expansion